Nothing triggers the Dems and their media quite as much as when Trump turns their identity politics against them.
It's a pretty awful statement to crap on people's homes like that....But this isn't costing Trump any votes. If some of these people say "hey, he's right what are the Dems really doing to deserve my vote" and stay home, then Trump wins.
Trump has attacked plenty of the white Democrats. But, predictably, every time he attacks Democrats of color who criticize him, the media calls him racist. What they don't understand is this rallies Trump's base not because they're racist, but because it exposes the hypocrisy of the Dems. He punches back - vulgar and moronic as he is, they like that he doesn't let identity politics bully him.